usb: gadget: uac2: provide a variable for interface and alt settings

This patch removes the shifting and masking of interface and its alt
setting and provides its own variable.

This looks better and is smaller:
 text    data     bss     dec     hex filename
x86-32
 6940     956      56    7952    1f10 gadget/audio.o.old
 6908     956      56    7920    1ef0 gadget/audio.o.new
arm
 7914     956      56    8926    22de gadget/audio.o.old
 7886     956      56    8898    22c2 gadget/audio.o.new

Acked-by: Jassi Brar <jassisinghbrar@gmail.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 23 insertions, 27 deletions

diff --git a/drivers/usb/gadget/f_uac2.c b/drivers/usb/gadget/f_uac2.c
index 86f8ac791420..503dd9782592 100644
--- a/drivers/usb/gadget/f_uac2.c
+++ b/drivers/usb/gadget/f_uac2.c
@@ -50,11 +50,6 @@ static int c_ssize = 2;
 module_param(c_ssize, uint, S_IRUGO);
 MODULE_PARM_DESC(c_ssize, "Capture Sample Size(bytes)");
 
-#define ALT_SET(x, a)   do {(x) &= ~0xff; (x) |= (a); } while (0)
-#define ALT_GET(x)      ((x) & 0xff)
-#define INTF_SET(x, i)  do {(x) &= 0xff; (x) |= ((i) << 8); } while (0)
-#define INTF_GET(x)     ((x >> 8) & 0xff)
-
 /* Keep everyone on toes */
 #define USB_XFERS       2
 
@@ -142,8 +137,9 @@ static struct snd_pcm_hardware uac2_pcm_hardware = {
 };
 
 struct audio_dev {
-        /* Currently active {Interface[15:8] | AltSettings[7:0]} */
-        __u16 ac_alt, as_out_alt, as_in_alt;
+        u8 ac_intf, ac_alt;
+        u8 as_out_intf, as_out_alt;
+        u8 as_in_intf, as_in_alt;
 
         struct usb_ep *in_ep, *out_ep;
         struct usb_function func;
@@ -950,8 +946,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
                 return ret;
         }
         std_ac_if_desc.bInterfaceNumber = ret;
-        ALT_SET(agdev->ac_alt, 0);
-        INTF_SET(agdev->ac_alt, ret);
+        agdev->ac_intf = ret;
+        agdev->ac_alt = 0;
 
         ret = usb_interface_id(cfg, fn);
         if (ret < 0) {
@@ -961,8 +957,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
         }
         std_as_out_if0_desc.bInterfaceNumber = ret;
         std_as_out_if1_desc.bInterfaceNumber = ret;
-        ALT_SET(agdev->as_out_alt, 0);
-        INTF_SET(agdev->as_out_alt, ret);
+        agdev->as_out_intf = ret;
+        agdev->as_out_alt = 0;
 
         ret = usb_interface_id(cfg, fn);
         if (ret < 0) {
@@ -972,8 +968,8 @@ afunc_bind(struct usb_configuration *cfg, struct usb_function *fn)
         }
         std_as_in_if0_desc.bInterfaceNumber = ret;
         std_as_in_if1_desc.bInterfaceNumber = ret;
-        ALT_SET(agdev->as_in_alt, 0);
-        INTF_SET(agdev->as_in_alt, ret);
+        agdev->as_in_intf = ret;
+        agdev->as_in_alt = 0;
 
         agdev->out_ep = usb_ep_autoconfig(gadget, &fs_epout_desc);
         if (!agdev->out_ep) {
@@ -1075,7 +1071,7 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
                 return -EINVAL;
         }
 
-        if (intf == INTF_GET(agdev->ac_alt)) {
+        if (intf == agdev->ac_intf) {
                 /* Control I/f has only 1 AltSetting - 0 */
                 if (alt) {
                         dev_err(&uac2->pdev.dev,
@@ -1085,16 +1081,16 @@ afunc_set_alt(struct usb_function *fn, unsigned intf, unsigned alt)
                 return 0;
         }
 
-        if (intf == INTF_GET(agdev->as_out_alt)) {
+        if (intf == agdev->as_out_intf) {
                 ep = agdev->out_ep;
                 prm = &uac2->c_prm;
                 config_ep_by_speed(gadget, fn, ep);
-                ALT_SET(agdev->as_out_alt, alt);
-        } else if (intf == INTF_GET(agdev->as_in_alt)) {
+                agdev->as_out_alt = alt;
+        } else if (intf == agdev->as_in_intf) {
                 ep = agdev->in_ep;
                 prm = &uac2->p_prm;
                 config_ep_by_speed(gadget, fn, ep);
-                ALT_SET(agdev->as_in_alt, alt);
+                agdev->as_in_alt = alt;
         } else {
                 dev_err(&uac2->pdev.dev,
                         "%s:%d Error!\n", __func__, __LINE__);
@@ -1146,12 +1142,12 @@ afunc_get_alt(struct usb_function *fn, unsigned intf)
         struct audio_dev *agdev = func_to_agdev(fn);
         struct snd_uac2_chip *uac2 = &agdev->uac2;
 
-        if (intf == INTF_GET(agdev->ac_alt))
-                return ALT_GET(agdev->ac_alt);
-        else if (intf == INTF_GET(agdev->as_out_alt))
-                return ALT_GET(agdev->as_out_alt);
-        else if (intf == INTF_GET(agdev->as_in_alt))
-                return ALT_GET(agdev->as_in_alt);
+        if (intf == agdev->ac_intf)
+                return agdev->ac_alt;
+        else if (intf == agdev->as_out_intf)
+                return agdev->as_out_alt;
+        else if (intf == agdev->as_in_intf)
+                return agdev->as_in_alt;
         else
                 dev_err(&uac2->pdev.dev,
                         "%s:%d Invalid Interface %d!\n",
@@ -1167,10 +1163,10 @@ afunc_disable(struct usb_function *fn)
         struct snd_uac2_chip *uac2 = &agdev->uac2;
 
         free_ep(&uac2->p_prm, agdev->in_ep);
-        ALT_SET(agdev->as_in_alt, 0);
+        agdev->as_in_alt = 0;
 
         free_ep(&uac2->c_prm, agdev->out_ep);
-        ALT_SET(agdev->as_out_alt, 0);
+        agdev->as_out_alt = 0;
 }
 
 static int
@@ -1277,7 +1273,7 @@ setup_rq_inf(struct usb_function *fn, const struct usb_ctrlrequest *cr)
         u16 w_index = le16_to_cpu(cr->wIndex);
         u8 intf = w_index & 0xff;
 
-        if (intf != INTF_GET(agdev->ac_alt)) {
+        if (intf != agdev->ac_intf) {
                 dev_err(&uac2->pdev.dev,
                         "%s:%d Error!\n", __func__, __LINE__);
                 return -EOPNOTSUPP;